7
8
3
4
1
5
2
9
9
1
8
9
5
9
2
1
4
5
1
6
1
9
6
9
8
3
1
1
4
5
Time 00:00
Mistakes 0
Ready
Expert Sudoku #90
XY-Wings, forced chains and positions that punish impatience.
| Difficulty | Expert |
| Clues given | 30 of 81 |
| Technique score | 72.8 |
| Rated techniques | 4 |
Techniques this puzzle needs
Where to start
The first move on this board is a Hidden Single: In this row 1, 1 can only go in one cell, so it must go there.
Progress is saved in this browser automatically. Use the keyboard: arrows to move, 1–9 to fill, N for notes, H for a hint.